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OTHER CURRENT ASSETS (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]    
Prepaid expenses $ 27,805 $ 22,358
Government institutions 6,340 4,068
Deferred installation expenses 5,659 3,000
Advances to suppliers 221 127
Employees 308 540
Others 1,061 1,395
Other current assets, net $ 41,394 $ 31,488